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Watch for 4 minutes. How many people were born in that time? How many people died?

If the current grade 9’s repeated this exercise exactly one year from today, at exactly the same time of day, by how much will the world’spopulation have grown? Do you think this is a problem? Why?

How much CO2 will have been added to the atmosphere by that time? How does South Africa compare to the rest of the world? Do you think all South African’scontribute equally to CO2 emissions in our country?

Discovering your impact

What Is A Carbon Footprint?

A carbon footprint is a measure of the impact our activities have on the environment, and in particular climate change. It relates to the amount ofgreenhouse gases produced in our day-to-day lives through burning fossil fuels for electricity, heating and transportation etc.

The carbon footprint is a measurement of all greenhouse gases we individually produce and has units of tonnes (or kg) of carbon dioxide equivalent.

A carbon footprint is made up of the sum of two parts, the primary footprint and the secondary footprint.

The primary footprint is a measure of our direct emissions of CO2 from the burning of fossil fuels including domestic energy consumption and transportation (e.g. car and plane).We have direct control of these.

The secondary footprint is a measure of the indirect CO2 emissions from the whole lifecycle of products we use - those associated with their manufacture and eventual breakdown. To putit very simply – the more we buy the more emissions will be caused on our behalf.

To work out what your carbon footprint is visit: http://www.carbonfootprint.com/calculator.aspx

To discover how to reduce your carbon footprint visit: http://www.carbonfootprint.com/minimisecfp.html

Climate change

Student’s guide to climate change





Identify the ABC’s (abiotic, biotic and cultural characteristics) of a natural environment near you. To make your ABC profile, follow the instructionsbelow.

1. Select an area that is undeveloped (i.e. no buildings, no pavement, no bulldozing, no spraying of pesticides, no farming, no grazing, etc.). Your areamust be at least the size of a soccer field. For some this will be an easy walk from their homes. Others will have to travel quite adistance‑‑lucky you! You can think of it as a field trip. Make a map of your province and show, approximately, where your area is located.

2. Identify the at least 10 “A” (abiotic) features of your area. Consider factors such as:

  • Landforms (mesa, mountain, valley, bench, etc..
  • Altitude

3. Identify at least 15 “B” (biotic) features of the area. (You may use common names.) Consider things such as:

  • Plants (trees, shrubs, grasses, flowers, etc.)
  • Insects (ants, bees, praying mantis, etc.)
  • Amphibians, reptiles, and/or fish

4. Identify at least 3 “C” (cultural) components. Look for evidence of human influence. Consider things such as:

  • *Recycling, conservation efforts
  • *Pollution
  • *Introduced species

Questions & Answers

do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
why and for what was five kingdom of classification of organisms introduced
give the ans as fast as possible
Comment on the ozone depletion over the period of 1982 to 1996
Mpho Reply

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Source:  OpenStax, Siyavula: life sciences grade 10. OpenStax CNX. Apr 11, 2012 Download for free at http://cnx.org/content/col11410/1.3
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